Home / Promotional Merchandise / F1 Convex Keyring F1 Convex Keyring Stylish oblong shape with convex sides to make it a very tactile keyring. Available in clear only so you can print to both sides of the paper insert. Add to Quote Category: Promotional Merchandise Related products Senator Liberty Ballpen Senator Dart Ballpen Contour-i Argent ballpen PromoMate Element ballpen